The problem (#1396) can be reproduced by selecting a shape in current image a, and go on next image b then press backspace to delete point. self.selectedShapes is in image a thus it doesn't exist in any shapes in image b.
Another possible solution is to clear selected shapes after loading a new image, but user may want to go back to original image and use those selected shapes.
The problem (#1396) can be reproduced by selecting a shape in current image
a, and go on next imagebthen press backspace to delete point.self.selectedShapesis in imageathus it doesn't exist in any shapes in imageb.Another possible solution is to clear selected shapes after loading a new image, but user may want to go back to original image and use those selected shapes.